Abstract
In clinical practice, the catheter has to be placed at an accurate position during anesthesia administration. However, effectively guiding the catheter to the accurate position in deeper tissues can be difficult for an inexperienced practitioner. We aimed to address the current issues associated with catheter placement using a novel smart assistance system for blood vessel catheter placement. We used a hollow introducer needle embedded with dual wavelength (690 and 850 nm) optical fibers to advance the tip into the subclavian vessels in anesthetized piglets. The results showed average optical density changes, and the difference between the absorption spectra and hemoglobin concentrations of different tissue components effectively identified different tissues (p < 0.05). The radial basis function neural network (RBFNN) technique was applied to distinguish tissue components (the F-measure value and accuracy were 93.02% and 94%, respectively). Finally, animal experiments were designed to validate the performance of the proposed system. Using this system based on oximetry, we easily navigated the needle tip to the target vessel. Based on the experimental results, the proposed system could effectively distinguish different tissue layers of the animals.
Highlights
Catheter placement, such as in internal jugular vein cannulation, cricothyroidotomy, and subclavian vein (SCV) cannulation, requires accurate needle placement into the target location.Anatomical landmarks and palpation are traditional methods used to guide the needle into the target location [1]
We investigate the changes in optical density of different tissue components
We investigate the changes in optical density of different tissue components corresponding to different wavelengths
Summary
Anatomical landmarks and palpation are traditional methods used to guide the needle into the target location [1] In clinical application, this is an invasive procedure, whereby we first identify the central blood vessel (most commonly the internal jugular, subclavian, or femoral vein) and insert a catheter into it. This is an invasive procedure, whereby we first identify the central blood vessel (most commonly the internal jugular, subclavian, or femoral vein) and insert a catheter into it These methods tend to be difficult for an inexperienced practitioner and may be influenced by the patient’s anatomy [2]. Lack of experience may cause tissue puncture during the procedure of cannulation To avoid this risk, a reliable method of locating the needle tip position is needed
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